Milk bottle cap



sept. 1s, '1934. P, P. GRAY ET AL. 1,973,758

MILK BOTTLE CAPl Filed Oct. 14, 1933 INVENTORS Phi/IP. P. Gray and/rw/'n M. Stone.

A TTORNEYS Patented Sept. 18, 1934 t UNITED STATES MILK BOTTLE CAP yPhilip P. Gray,

rarest mus, and Irwin M. stone,A New York, N. Y.

Application October 14, 1933, Serial No. 693,566

l Claim.

This invention relates to caps or other closures for bottles or othercontainers.

In the particular embodiment described herein it Ais concerned with acap for a milk or cream bottle.

The caps now commonly employed for such bottles consist of cardboardimpregnated with paraflin. The upper surface of such caps usually bearslegends describing the cbntents of the bottle and the name of thecompany furnishing the product.

According to the present invention, provision is made for permittingthese caps to bear advertising or similar legends on their lowersurface.

For this purpose the lower surface of the cap on which the legend isprinted is covered with a membrane which is adhesively united to the capand which has the property, when-placed in contact with the liquidcontained in the bottle, of absorbing a small quantity of such liquidand of expanding when thusv moistened. As a result of this, the membranewill buckle and break the adhesive union between it and the cap. Whenthe consumer removes the cap from the bottle, the membrane will remainin place, thus exposing to view the printed matter at the lower surfaceof the cap. n

'I'he membrane referred to is preferably a transparent member such astransparent regeneratedbellulose, but it will be understood that anyother suitable means may be employed. The adhesive union between themembrane and the cap is preferably effected by means of parain `withwhich the regular commercial cap of the present day is impregnated, theadhesion being secured by the mere application of heat.

In the accompanying drawing,

Figure 1 shows a bottom plan view of the device of the presentinvention,

Figure 2-is a cross section of Figurel along lines 2 2, and

Figure 3 is a fragmentary viewoi the upper end of the milk bottleshowing the cap in place.

Similar reference characters indicate similar parts in the severalviews.

In the drawing, reference character 1 designates a cap of the type nowusually employed for bottles or other containers oi milk or cream,'

'I'he lower surface of the disc 1 bears a legend, such as'indicated at3, which may be in the nature of an advertisement. If the cap 1 wereused without the membrane 2, the printed mattero! the lower surface ofthe cap might contaminate the contents of the bottle. In any event, itwould be obscured to a large extent by reason of the y tion to the cap.As a result, the membrane will remain in place when the'cap is removedby the consumer. The under surface of the cap will then be exposed andthis surface will be found clean and unobscured by the adhesion theretoof any portion of the contents of the bottle. After the consumer hasthus removed the disc 1 he may readily remove the membrane 2 and discardthe same. Moreover, if the consumer uses only part of the contents ofthe bottle he may replace the cap 1 without the membrane 2, as in suchcase the contents of the partly emptied'bottle will not be incontactwith the cap, so that there will be no contamination of the contents. y4

It will be understood that instead of transparent regenerated cellulose,other suitable materialsmay be used for said membrane. One of theproducts now Widely sold on the market under the name Cellophane issuitable for use in connection with the present invention.

We have described what we believe to be the best embodiment of ourinvention. We do not Wish, however, to be c'onned to the embodimentshown, but what we desire to cover by Letters Patent is set forth in theappended claim.

We claim: ,f

A cap for milk bottles and the like, comprising a pasteboard discimpregnated with parailin, a membrane of transparent regeneratedcellulose having the property of expanding on prolonged contact withmoisture, said membrane being adhesively united with said disc by theparaiin with which the disc is impregnated, said adhesive union havingthe property of loosening its hold when the membrane is expanded byprolonged contact with moisture, and said disc bearing a legend-`covered by said membrane.

' PHILIP P. GRAY.

IRWIN M. ISTONE.

